CN110306017A - Annealing furnace proportion control type burner air-fuel ratio control method and system - Google Patents
Annealing furnace proportion control type burner air-fuel ratio control method and system Download PDFInfo
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- CN110306017A CN110306017A CN201910647842.9A CN201910647842A CN110306017A CN 110306017 A CN110306017 A CN 110306017A CN 201910647842 A CN201910647842 A CN 201910647842A CN 110306017 A CN110306017 A CN 110306017A
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- 238000000137 annealing Methods 0.000 title claims abstract description 119
- 239000000446 fuel Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 82
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003546 flue gas Substances 0.000 claims abstract description 4
- 239000000567 combustion gas Substances 0.000 claims description 114
- 238000002360 preparation method Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Heat Treatment Processes (AREA)
- Regulation And Control Of Combustion (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a method and a system for controlling the air-fuel ratio of a burner of an annealing furnace proportion control type, which relate to the technical field of steel, can monitor the current heating power, the current air flow set value and the current actual air flow value in real time or regularly, and set preset conditions according to the working condition of the annealing furnace to compensate the air flow or the gas flow in time, thereby correcting the set value of a gas flow transmitter of an air flow transmitter in time, correcting the set value of the gas flow transmitter of the air flow transmitter in time no matter whether the actual air-fuel ratio is higher or lower, so that the air-fuel ratio of the system is in a reasonable range, ensuring the normal combustion of the annealing furnace, avoiding the problems that when the actual air-fuel ratio is lower due to the abnormal detection of the gas flow transmitter or the air flow transmitter, unburned gas enters a flue gas pipeline to be subjected to secondary combustion, and, the combustion efficiency of the annealing furnace is improved, and meanwhile, the safety of the equipment is improved.
Description
Technical field
The present invention relates to iron and steel technical field more particularly to a kind of annealing furnace proportional control type burner air/fuel ratio control methods
And system.
Background technique
The common heating equipment of the continuous annealing furnace bringing-up section of cold rolling vertical type is gas fired radiant tubes, for the combustion gas of ratio control
For radiant tube, existing air/fuel ratio control method, there are burner extinguishings, and unit to be caused to be forced reduction of speed or accelerate to expand in pipeline
The problem of damages of equipment such as section.
Summary of the invention
The embodiment of the present application, can be right by providing a kind of annealing furnace proportional control type burner air/fuel ratio control method and system
Air-fuel ratio is timely adjusted, with solve it is above-mentioned at least partly the technical issues of.
On the one hand, the application is provided the following technical solutions by the embodiment of the application:
A kind of annealing furnace proportional control type burner air/fuel ratio control method, for controlling the annealing furnace, the method packet
It includes:
Obtain heating power, air mass flow setting value and the actual air magnitude of the annealing furnace；
Judge whether the heating power is less than or equal to the first preset value and the air mass flow setting value and the reality
Whether the difference of border air amount value is less than or equal to the second preset value；
If the heating power is less than or equal to the first preset value, and the air mass flow setting value and the amount of actual air for combustion
The difference of value is less than or equal to the second preset value, then theoretical combustion gas magnitude after being arranged to compensate for the air mass flow setting value and
Lesser value between compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the combustion of the annealing furnace
Throughput setting value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between biggish value, obtain
Gas flow setting value after setting；Make the annealing furnace by the gas flow after the air mass flow setting value and setting after setting
Setting value operation；
If the heating power is greater than the first preset value, and the air mass flow setting value and the actual air magnitude
Difference is greater than the second preset value, then theoretical combustion gas magnitude after being arranged to compensate for the air mass flow setting value and compensated
Biggish value between practical combustion gas magnitude, the air mass flow setting value after being arranged；The gas flow of the annealing furnace is set
Definite value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between lesser value, after being arranged
Gas flow setting value；Transport the annealing furnace by the gas flow setting value after the air mass flow setting value and setting after setting
Row；
Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated actual air
Magnitude is obtained based on preset compensation air-fuel ratio.
Optionally, the method that the compensated theoretical combustion gas magnitude obtains, comprising:
Using theoretical combustion gas magnitude multiplied by preset compensation air-fuel ratio, compensated theoretical combustion gas magnitude is obtained；
The method that the compensated practical combustion gas magnitude obtains, comprising:
Using practical combustion gas magnitude multiplied by preset compensation air-fuel ratio, compensated practical combustion gas magnitude is obtained；
The method that the compensated actual air magnitude obtains, comprising:
Using actual air magnitude multiplied by preset compensation air-fuel ratio, compensated actual air magnitude is obtained.
Optionally, the preparation method of the preset compensation air-fuel ratio includes:
Obtain the optimum air-fuel ratio of the annealing furnace；
Based on the optimum air-fuel ratio, the preset compensation air-fuel ratio is obtained.
Optionally, described to be based on optimum air-fuel ratio, the preset compensation air-fuel ratio is obtained, is specifically included:
Wherein, rcIndicate preset compensation air-fuel ratio, β indicates that the burner of annealing furnace compensates air-fuel ratio, and n indicates annealing furnace
Burner failure number, N indicate the burner total number of annealing furnace, and r indicates optimum air-fuel ratio.
Optionally, the preparation method of the optimum air-fuel ratio, comprising:
Wherein, α indicates the remaining oxygen coefficient in the flue gas of annealing furnace, r0Indicate the chemically correct fuel of combustion gas, EO2Expression is moved back
Remaining oxygen needed for stove.
Optionally, the preparation method of the theoretical combustion gas magnitude, comprising:
Wherein, Fgas-0Representation theory gas quantity, P indicate that heating power, LCV indicate that fuel gases calorific value, i indicate burner label,
Value range 1~N, N indicate the burner total number of annealing furnace, wiIndicate i-th of burner power.
Optionally, first preset value is 30%；Second preset value is -150.
On the other hand, the application provides a kind of annealing furnace proportional control type burner air-fuel by another embodiment of the application
Than control system, for controlling the annealing furnace, the system comprises:
First obtains module, for obtaining heating power, air mass flow setting value and the actual air magnitude of annealing furnace；
Judgment module, for judging whether the heating power is less than or equal to the first preset value and the air mass flow
Whether setting value and the difference of the actual air magnitude are less than or equal to the second preset value；
Air clipping module, if being less than or equal to the first preset value for the heating power, and the air mass flow is set
Value and the difference of the actual air magnitude are less than or equal to the second preset value, then are arranged to compensate for the air mass flow setting value
Lesser value between theoretical combustion gas magnitude and compensated practical combustion gas magnitude afterwards, the air mass flow setting after being arranged
Value；Theoretical combustion gas magnitude and compensated amount of actual air for combustion after the gas flow setting value of the annealing furnace is arranged to compensate for
Biggish value between value, the gas flow setting value after being arranged；Set the annealing furnace by the air mass flow after setting
Gas flow setting value operation after value and setting；
Combustion gas clipping module, if for the heating power be greater than the first preset value, and the air mass flow setting value with
The difference of the actual air magnitude is greater than the second preset value, the then theory after being arranged to compensate for the air mass flow setting value
Biggish value between combustion gas magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；It will be described
The gas flow setting value of annealing furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between compared with
Small value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value and setting after setting
Gas flow setting value operation afterwards.
Optionally, the system also includes:
First obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reason using theoretical combustion gas magnitude
By combustion gas magnitude；
Second obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reality using practical combustion gas magnitude
Border combustion gas magnitude；
Third obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reality using actual air magnitude
Border air amount value.
Optionally, the system also includes:
Second obtains module, for obtaining the optimum air-fuel ratio of the annealing furnace；
4th obtains module, for being based on the optimum air-fuel ratio, obtains the preset compensation air-fuel ratio.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The present invention, in annealing furnace operation, obtains heating power, the air stream of the annealing furnace for controlling annealing furnace
Measure setting value and actual air magnitude；And judge whether the heating power is less than or equal to the first preset value and the air
Whether the difference of flow setting value and the actual air magnitude is less than or equal to the second preset value；If the heating power be greater than etc.
In the first preset value, and the air mass flow setting value and the difference of the actual air magnitude are less than or equal to the second preset value,
Between theoretical combustion gas magnitude and compensated practical combustion gas magnitude after then the air mass flow setting value is arranged to compensate for compared with
Small value, the air mass flow setting value after being arranged；After the gas flow setting value of the annealing furnace is arranged to compensate for
Biggish value between theoretical combustion gas magnitude and compensated actual air magnitude, the gas flow setting value after being arranged；Make
The annealing furnace is by the gas flow setting value operation after the air mass flow setting value and setting after setting；Due to air mass flow
It has carried out taking relatively small value, has achieved the purpose that air mass flow limits, corrected air-fuel ratio in time, can avoid because of gas flow pick-up
When device or air mass flow transmitters sense cause actual air-fuel ratio higher extremely, burner is caused to extinguish, unit is forced reduction of speed
Problem；Meanwhile if the heating power is greater than the first preset value, and the air mass flow setting value and the actual air magnitude
Difference be greater than the second preset value, then after theoretical combustion gas magnitude after being arranged to compensate for the air mass flow setting value and compensation
Practical combustion gas magnitude between biggish value, the air mass flow setting value after being arranged；By the gas flow of the annealing furnace
Setting value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between lesser value, after being arranged
Gas flow setting value；Make the annealing furnace by the gas flow setting value after the air mass flow setting value and setting after setting
Operation；Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated actual air magnitude
It is obtained based on preset compensation air-fuel ratio.Due to having carried out taking relatively small value to gas flow, gas flow limitation is reached
Purpose corrects air-fuel ratio in time, can avoid leading to reality extremely because of gas flow transmitter or air mass flow transmitters sense
When air-fuel ratio is relatively low, causes unburned coal gas to enter flue and second-time burning occurs, accelerate the equipment such as expansion joint in pipeline
Damage the problem of, improve the efficiency of combustion of annealing furnace, meanwhile, improve the safety of equipment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the flow chart of the annealing furnace proportional control type burner air/fuel ratio control method in an embodiment of the present invention；
Fig. 2 is the annealing furnace proportional control type burner auxiliary fuel supply-system structure chart in an embodiment of the present invention.
Specific embodiment
The embodiment of the present application is solved by providing a kind of annealing furnace proportional control type burner air/fuel ratio control method and system
The technical issues of burner extinguishing causes unit to be forced reduction of speed or accelerates the damage of equipment such as expansion joint in pipeline in the prior art.
The technical solution of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows:
A kind of annealing furnace proportional control type burner air/fuel ratio control method, for controlling the annealing furnace, the method packet
It includes:
Obtain heating power, air mass flow setting value and the actual air magnitude of annealing furnace；Judging the heating power is
It is no to be less than or equal to the first preset value and the air mass flow setting value and whether the difference of the actual air magnitude is less than
In the second preset value；If the heating power is more than or equal to the first preset value, and the air mass flow setting value and the reality
The difference of air amount value is less than or equal to the second preset value, the then theoretical combustion gas after being arranged to compensate for the air mass flow setting value
Lesser value between magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the annealing
The gas flow setting value of furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between it is biggish
Value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value after setting and after being arranged
The operation of gas flow setting value；If the heating power is greater than the first preset value, and the air mass flow setting value and the reality
The difference of border air amount value is greater than the second preset value, the then theoretical gas quantity after being arranged to compensate for the air mass flow setting value
Biggish value between value and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the annealing furnace
Gas flow setting value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between lesser value,
Gas flow setting value after being arranged；Make the annealing furnace by the combustion gas after the air mass flow setting value and setting after setting
Flow setting value operation；Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated reality
Border air amount value is obtained based on preset compensation air-fuel ratio.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Illustrate first, herein presented term "and/or", only a kind of incidence relation for describing affiliated partner, table
Show there may be three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, individualism B this three
Kind situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Embodiment one
In the present embodiment, a kind of annealing furnace proportional control type burner air/fuel ratio control method, referring to Fig. 1, the method packet
Include following steps:
S101, heating power, air mass flow setting value and the actual air magnitude for obtaining the annealing furnace；
S102, judge the heating power whether be less than or equal to the first preset value and the air mass flow setting value with
Whether the difference of the actual air magnitude is less than or equal to the second preset value；
If S103, the heating power are more than or equal to the first preset value, and the air mass flow setting value and the reality
The difference of air amount value is less than or equal to the second preset value, the then theoretical combustion gas after being arranged to compensate for the air mass flow setting value
Lesser value between magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the annealing
The gas flow setting value of furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between it is biggish
Value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value after setting and after being arranged
The operation of gas flow setting value；
If S104, the heating power are greater than the first preset value, and the air mass flow setting value and the actual air
The difference of magnitude is greater than the second preset value, then theoretical combustion gas magnitude and benefit after being arranged to compensate for the air mass flow setting value
Biggish value between practical combustion gas magnitude after repaying, the air mass flow setting value after being arranged；By the combustion gas of the annealing furnace
Flow setting value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between lesser value, set
The gas flow setting value postponed；Set the annealing furnace by the gas flow after the air mass flow setting value and setting after setting
Definite value operation；
Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated actual air
Magnitude is obtained based on preset compensation air-fuel ratio.
It should be noted that method of the invention, empty for controlling the proportional control type burner of annealing furnace of iron and steel domain
Ratio is fired, annealing furnace is respectively arranged with gas control system (such as gas flow transmitter) and air control system for air (air mass flow
Transmitter), and, respectively by setting gas flow transmitter and air mass flow transmitter, combustion gas can be carried out according to burning needs
The control of air inflow and air inlet amount, so that the air-fuel ratio of annealing furnace is controlled, to reach combustion efficiency.But in operational process
In, gas flow transmitter or air mass flow transmitter are likely to occur detection exception, and cause actual air-fuel ratio higher, relatively low,
Default value is unable to reach so as to cause burner air-fuel ratio.Method of the invention, can real-time monitoring or periodic monitoring it is current
Heating power, present air flow setting value and currently practical air amount value, and preset condition is set according to the operating condition of annealing furnace,
The timely compensation for carrying out air mass flow or gas flow, thus the setting value of the gas flow transmitter to air mass flow transmitter
It is timely corrected, it is higher or relatively low to make no matter to occur actual air-fuel ratio, can timely correct, so that system air-fuel
In the zone of reasonableness of ratio, guarantee the normal combustion of annealing furnace.
Referring to Fig. 1, S101 is first carried out, obtains heating power, air mass flow setting value and the practical sky of the annealing furnace
Tolerance value.
Specifically, current heating power can be directly acquired by annealing furnace apparatus control detection display interface, or pass through
System parameter is calculated using existing heating power calculation method and is obtained, and here as known quantity is obtained；Air mass flow is set
Definite value is the given value of setting, and actual air magnitude can be obtained by real-time monitoring instrument.
Next, executing S102, judge whether the heating power is less than or equal to the first preset value and the air stream
Whether amount setting value and the difference of the actual air magnitude are less than or equal to the second preset value.
In the specific implementation process, different annealing furnaces or it is different operating condition, there is different preset values, it can be according to annealing
The needs of furnace system combustion, are arranged preset value.
As an alternative embodiment, first preset value is 30%；Second preset value is -150.
For example, 5th area are heated for Shoudu Iron and Steel Co capital Tang's galvanization annealing furnace, amounts to 20 burners, each burner power is equal
For 140Kw, fuel gases calorific value is 17010.9684 KJ/m3, first preset value is 30%；Second preset value is -150.
Next, S103 is executed, if the heating power is less than or equal to the first preset value, and the air mass flow setting value
It is less than or equal to the second preset value with the difference of the actual air magnitude, then after being arranged to compensate for the air mass flow setting value
Theoretical combustion gas magnitude and compensated practical combustion gas magnitude between lesser value, the air mass flow setting value after being arranged；
Theoretical combustion gas magnitude and compensated actual air magnitude after the gas flow setting value of the annealing furnace is arranged to compensate for
Between biggish value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value after setting
With the gas flow setting value operation after setting.
As an alternative embodiment,
The method that the compensated theoretical combustion gas magnitude obtains, comprising:
Use theoretical combustion gas magnitude Fgas-0Multiplied by preset compensation air-fuel ratio rc, obtain compensated theoretical combustion gas magnitude
Fgas-0·rc；
The method that the compensated practical combustion gas magnitude obtains, comprising:
Use practical combustion gas magnitude Fgas-pMultiplied by preset compensation air-fuel ratio rc, obtain compensated practical combustion gas magnitude
Fgas-p·rc；
The method that the compensated actual air magnitude obtains, comprising:
Use actual air magnitude Fair-pMultiplied by preset compensation air-fuel ratio rc, obtain compensated actual air magnitude
Fair-p·rc。
Specifically, preset compensation air-fuel ratio rcPreparation method include:
Obtain the optimum air-fuel ratio of the annealing furnace；
Based on the optimum air-fuel ratio, the preset compensation air-fuel ratio is obtained.
More specifically, described to be based on optimum air-fuel ratio, the preset compensation air-fuel ratio is obtained, is specifically included:
Wherein, rcIndicate preset compensation air-fuel ratio, β indicates that the burner of annealing furnace compensates air-fuel ratio, takes 1.05~2, n table
Show the burner failure number of annealing furnace, N indicates the burner total number of annealing furnace, and r indicates optimum air-fuel ratio.
More specifically, the preparation method of the optimum air-fuel ratio, comprising:
Wherein, α indicates the remaining oxygen coefficient in the flue gas of annealing furnace, r0Indicate the chemically correct fuel of combustion gas, EO2Expression is moved back
Remaining oxygen needed for stove.
For known annealing furnace, above-mentioned remaining oxygen coefficient, chemically correct fuel, remaining oxygen are all that can directly obtain
Know parameter, or can directly calculate acquisition using known method.
As a kind of performance, when meeting above-mentioned preset condition, the air mass flow setting value of the annealing furnace and combustion
The setting means of throughput setting value is as follows:
Air mass flow setting value Fair-s=min (Fgas-0·rc, Fgas-p·rc),
Gas flow setting value Fgas-s=max (Fgas-0·rc, Fair-p·rc)；
When being unsatisfactory for above-mentioned preset condition,
Execute step S104, if the heating power be greater than the first preset value, and the air mass flow setting value with it is described
The difference of actual air magnitude is greater than the second preset value, the then theoretical combustion gas after being arranged to compensate for the air mass flow setting value
Biggish value between magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the annealing
The gas flow setting value of furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between it is lesser
Value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value after setting and after being arranged
The operation of gas flow setting value.
Therefore, as another performance, the air mass flow setting value of the annealing furnace and gas flow setting value
Setting means is as follows:
Air mass flow setting value Fair-s=max (Fgas-0·rc, Fgas-p·rc)；
Gas flow setting value Fgas-s=min (Fgas-0·rc, Fair-p·rc)。
Specifically, the theory combustion gas magnitude Fgas-0Preparation method, comprising:
Wherein, Fgas-0Representation theory gas quantity, P indicate that heating power, LCV indicate that fuel gases calorific value, i indicate burner label,
Value range 1~N, N indicate the burner total number of annealing furnace, wiIndicate i-th of burner power.
Technical solution in above-mentioned the embodiment of the present application, at least have the following technical effects or advantages:
The present invention, in annealing furnace operation, obtains heating power, the air stream of the annealing furnace for controlling annealing furnace
Measure setting value and actual air magnitude；And judge whether the heating power is less than or equal to the first preset value and the air
Whether the difference of flow setting value and the actual air magnitude is less than or equal to the second preset value；If the heating power be greater than etc.
In the first preset value, and the air mass flow setting value and the difference of the actual air magnitude are less than or equal to the second preset value,
Between theoretical combustion gas magnitude and compensated practical combustion gas magnitude after then the air mass flow setting value is arranged to compensate for compared with
Small value, the air mass flow setting value after being arranged；After the gas flow setting value of the annealing furnace is arranged to compensate for
Biggish value between theoretical combustion gas magnitude and compensated actual air magnitude, the gas flow setting value after being arranged；Make
The annealing furnace is by the gas flow setting value operation after the air mass flow setting value and setting after setting；Due to air mass flow
It has carried out taking relatively small value, has achieved the purpose that air mass flow limits, corrected air-fuel ratio in time, can avoid because of gas flow pick-up
When device or air mass flow transmitters sense cause actual air-fuel ratio higher extremely, burner is caused to extinguish, unit is forced reduction of speed
Problem；Meanwhile if the heating power is greater than the first preset value, and the air mass flow setting value and the actual air magnitude
Difference be greater than the second preset value, then after theoretical combustion gas magnitude after being arranged to compensate for the air mass flow setting value and compensation
Practical combustion gas magnitude between biggish value, the air mass flow setting value after being arranged；By the gas flow of the annealing furnace
Setting value be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between lesser value, after being arranged
Gas flow setting value；Make the annealing furnace by the gas flow setting value after the air mass flow setting value and setting after setting
Operation；Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated actual air magnitude
It is obtained based on preset compensation air-fuel ratio.Due to having carried out taking relatively small value to gas flow, gas flow limitation is reached
Purpose corrects air-fuel ratio in time, can avoid leading to reality extremely because of gas flow transmitter or air mass flow transmitters sense
When air-fuel ratio is relatively low, causes unburned coal gas to enter flue and second-time burning occurs, accelerate the equipment such as expansion joint in pipeline
Damage the problem of, improve the efficiency of combustion of annealing furnace, meanwhile, improve the safety of equipment.
Embodiment two
In the present embodiment, a kind of annealing furnace proportional control type burner auxiliary fuel supply-system, for controlling the annealing furnace,
Referring to fig. 2, the system comprises:
First obtains module, for obtaining heating power, air mass flow setting value and the actual air magnitude of annealing furnace；
Judgment module, for judging whether the heating power is less than or equal to the first preset value and the air mass flow
Whether setting value and the difference of the actual air magnitude are less than or equal to the second preset value；
Air clipping module, if being less than or equal to the first preset value for the heating power, and the air mass flow is set
Value and the difference of the actual air magnitude are less than or equal to the second preset value, then are arranged to compensate for the air mass flow setting value
Lesser value between theoretical combustion gas magnitude and compensated practical combustion gas magnitude afterwards, the air mass flow setting after being arranged
Value；Theoretical combustion gas magnitude and compensated amount of actual air for combustion after the gas flow setting value of the annealing furnace is arranged to compensate for
Biggish value between value, the gas flow setting value after being arranged；Set the annealing furnace by the air mass flow after setting
Gas flow setting value operation after value and setting；
Combustion gas clipping module, if for the heating power be greater than the first preset value, and the air mass flow setting value with
The difference of the actual air magnitude is greater than the second preset value, the then theory after being arranged to compensate for the air mass flow setting value
Biggish value between combustion gas magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；It will be described
The gas flow setting value of annealing furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between compared with
Small value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value and setting after setting
Gas flow setting value operation afterwards.
As an alternative embodiment, the system also includes:
First obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reason using theoretical combustion gas magnitude
By combustion gas magnitude；
Second obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reality using practical combustion gas magnitude
Border combustion gas magnitude；
Third obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated reality using actual air magnitude
Border air amount value.
As an alternative embodiment, the system also includes:
Second obtains module, for obtaining the optimum air-fuel ratio of the annealing furnace；
4th obtains module, for being based on the optimum air-fuel ratio, obtains the preset compensation air-fuel ratio.
Since the annealing furnace proportional control type burner auxiliary fuel supply-system that the present embodiment is introduced is real to implement the application
System used by annealing furnace proportional control type burner air/fuel ratio control method in example one is applied, so it is based on the embodiment of the present application one
Described in annealing furnace proportional control type burner air/fuel ratio control method, those skilled in the art can understand this implementation
The specific embodiment and its various change form of the system of example, so how to realize that the application is implemented for the system herein
Method in example is no longer discussed in detail.It is controlled as long as those skilled in the art implement annealing furnace ratio in the embodiment of the present application
System used by type burner air/fuel ratio control method belongs to the range to be protected of the application.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of annealing furnace proportional control type burner air/fuel ratio control method, for controlling annealing furnace, which is characterized in that the side
Method includes:
Obtain heating power, air mass flow setting value and the actual air magnitude of the annealing furnace；
Judge whether the heating power is less than or equal to the first preset value and the air mass flow setting value and the practical sky
Whether the difference of tolerance value is less than or equal to the second preset value；
If the heating power is less than or equal to the first preset value, and the air mass flow setting value and the actual air magnitude
Difference is less than or equal to the second preset value, then theoretical combustion gas magnitude and compensation after being arranged to compensate for the air mass flow setting value
Lesser value between practical combustion gas magnitude afterwards, the air mass flow setting value after being arranged；By the combustion gas stream of the annealing furnace
Biggish value between theoretical combustion gas magnitude and compensated actual air magnitude after setting value is arranged to compensate for is measured, is arranged
Gas flow setting value afterwards；Set the annealing furnace by the gas flow after the air mass flow setting value and setting after setting
Value operation；
If the heating power is greater than the first preset value, and the difference of the air mass flow setting value and the actual air magnitude
Theoretical combustion gas magnitude and compensated reality greater than the second preset value, then after being arranged to compensate for the air mass flow setting value
Biggish value between combustion gas magnitude, the air mass flow setting value after being arranged；By the gas flow setting value of the annealing furnace
Lesser value between theoretical combustion gas magnitude and compensated actual air magnitude after being arranged to compensate for, the combustion gas after being arranged
Flow setting value；Run the annealing furnace by the gas flow setting value after the air mass flow setting value and setting after setting；
Wherein, the compensated theoretical combustion gas magnitude, compensated practical combustion gas magnitude and compensated actual air magnitude
It is obtained based on preset compensation air-fuel ratio.
2. the method as described in claim 1, which is characterized in that
The method that the compensated theoretical combustion gas magnitude obtains, comprising:
Using theoretical combustion gas magnitude multiplied by preset compensation air-fuel ratio, compensated theoretical combustion gas magnitude is obtained；
The method that the compensated practical combustion gas magnitude obtains, comprising:
Using practical combustion gas magnitude multiplied by preset compensation air-fuel ratio, compensated practical combustion gas magnitude is obtained；
The method that the compensated actual air magnitude obtains, comprising:
Using actual air magnitude multiplied by preset compensation air-fuel ratio, compensated actual air magnitude is obtained.
3. method according to claim 2, which is characterized in that it is described it is preset compensation air-fuel ratio preparation method include:
Obtain the optimum air-fuel ratio of the annealing furnace；
Based on the optimum air-fuel ratio, the preset compensation air-fuel ratio is obtained.
4. method as claimed in claim 3, which is characterized in that it is described to be based on optimum air-fuel ratio, obtain the preset compensation
Air-fuel ratio specifically includes:
Wherein, rcIndicate preset compensation air-fuel ratio, β indicates that the burner of annealing furnace compensates air-fuel ratio, and n indicates the burner of annealing furnace
Failure number, N indicate the burner total number of annealing furnace, and r indicates optimum air-fuel ratio.
5. the method as claimed in claim 3 or 4, which is characterized in that the preparation method of the optimum air-fuel ratio, comprising:
Wherein, α indicates the remaining oxygen coefficient in the flue gas of annealing furnace, r0Indicate the chemically correct fuel of combustion gas, EO2Indicate annealing furnace
Required remaining oxygen.
6. method according to claim 2, which is characterized in that the preparation method of the theory combustion gas magnitude, comprising:
Wherein, Fgas-0Representation theory gas quantity, P indicate that heating power, LCV indicate that fuel gases calorific value, i indicate burner label, value
Range 1~N, N indicate the burner total number of annealing furnace, wiIndicate i-th of burner power.
7. the method as described in claim 1, which is characterized in that first preset value is 30%；Second preset value be-
150。
8. a kind of annealing furnace proportional control type burner auxiliary fuel supply-system, for controlling the annealing furnace, which is characterized in that institute
The system of stating includes:
First obtains module, for obtaining heating power, air mass flow setting value and the actual air magnitude of annealing furnace；
Judgment module, for judging whether the heating power is less than or equal to the first preset value and air mass flow setting
Whether value and the difference of the actual air magnitude are less than or equal to the second preset value；
Air clipping module, if for the heating power be less than or equal to the first preset value, and the air mass flow setting value with
The difference of the actual air magnitude is less than or equal to the second preset value, then after being arranged to compensate for the air mass flow setting value
Lesser value between theoretical combustion gas magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；It will
The gas flow setting value of the annealing furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude it
Between biggish value, the gas flow setting value after being arranged；Make the annealing furnace by after setting air mass flow setting value and
Gas flow setting value operation after setting；
Combustion gas clipping module, if for the heating power be greater than the first preset value, and the air mass flow setting value with it is described
The difference of actual air magnitude is greater than the second preset value, the then theoretical combustion gas after being arranged to compensate for the air mass flow setting value
Biggish value between magnitude and compensated practical combustion gas magnitude, the air mass flow setting value after being arranged；By the annealing
The gas flow setting value of furnace be arranged to compensate for after theoretical combustion gas magnitude and compensated actual air magnitude between it is lesser
Value, the gas flow setting value after being arranged；Make the annealing furnace by the air mass flow setting value after setting and after being arranged
The operation of gas flow setting value.
9. system as claimed in claim 8, which is characterized in that the system also includes:
First obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated theoretical combustion using theoretical combustion gas magnitude
Tolerance value；
Second obtains module, for, multiplied by preset compensation air-fuel ratio, obtaining compensated practical combustion using practical combustion gas magnitude
Tolerance value；
Third obtains module, for, multiplied by preset compensation air-fuel ratio, being obtained compensated practical empty using actual air magnitude
Tolerance value.
10. system as claimed in claim 9, which is characterized in that the system also includes:
Second obtains module, for obtaining the optimum air-fuel ratio of the annealing furnace；
4th obtains module, for being based on the optimum air-fuel ratio, obtains the preset compensation air-fuel ratio.
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| CN115029527A (en) * | 2022-04-27 | 2022-09-09 | 首钢智新迁安电磁材料有限公司 | Control method for steam dew point of humidifier |
| CN115029527B (en) * | 2022-04-27 | 2023-09-19 | 首钢智新迁安电磁材料有限公司 | Control method for steam dew point of humidifier |
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